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By travelling at 40 kmph, a person reaches his destination on time. He covered two-third the total distance in one-third of the total time.…

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By travelling at 40 kmph, a person reaches his destination on time. He covered two-third the total distance in one-third of the total time. What speed should he maintain for the remaining distance to

A20 kmph
B30 kmph
C25 kmph
D15 kmph

Correct answer: A

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Discussion 1

CCommunity01 Jul 2021

20 kmph

Let the time taken to reach the destination be 3x hours. Total distance = 40 * 3x = 120x km
He covered 2/3 * 120x = 80x km in 1/3 * 3x = x hours So, the remaining 40x km, he has to cover in 2x hours. Required speed = 40x/2x = 20 kmph.